215843648 has 56 divisors (see below), whose sum is σ = 454456800. Its totient is φ = 101426688.

The previous prime is 215843647. The next prime is 215843651. The reversal of 215843648 is 846348512.

215843648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215843647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168386 + ... + 169662.

It is an arithmetic number, because the mean of its divisors is an integer number (8115300).

Almost surely, 2^215843648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215843648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227228400).

215843648 is an abundant number, since it is smaller than the sum of its proper divisors (238613152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215843648 is a wasteful number, since it uses less digits than its factorization.

215843648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447 (or 1437 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 215843648 is about 14691.6182907126. The cubic root of 215843648 is about 599.8551946848.

The spelling of 215843648 in words is "two hundred fifteen million, eight hundred forty-three thousand, six hundred forty-eight".